title: Thomas Huxley and the rat placenta in the early debates on evolution.
mesh_terms: D000715:Anatomy / Q000266:history*; D000818:Animals; D005075:Biological Evolution; D003656:Decidua / Q000502:physiology; D005260:Female; D049672:History, 19th Century; D008322:Mammals / Q000145:classification*; D010920:Placenta / Q000098:blood supply / Q000502:physiology*; D011247:Pregnancy; D011270:Pregnancy, Animal / Q000502:physiology*; D051381:Rats; D014327:Trophoblasts / Q000502:physiology